Ecomax Fuel Saver with Chip,Dual-Plate Eco Obd2 & Nitro Obd2 Code Reader Diagnostic Scan Tool

Sorry to say, but this unit does not live up to its promise. I had high hopes that it would help my very well maintained 2011 Ford Explorer XLT SUV with 3.5 Liter, 6 cylinder engine. I was getting ~22 to 24 MPG before I installed the fuel saver unit. I drove with it installed for several weeks, but saw NO improvements and it actually went down driving the same routes. So it does NOT live up to the expectations and I plan to return the unit for a refund. So my recommendation is DON'T buy it, DON'T spend the money - NOT worth it!

Bought before I researched. Found out this is a scam. Waste of money.

This will ruin your car, it stays on even when the car is off, drains your battery, once you hit about 160 miles it messed up your fuses and drive terrain and check engine light comes on. I didn’t listen to reviews so I had to see for myself. DO NOT BUY

Mileage dropped to 34mpg. Was very easy to use.i did as instructed twice and it made no difference. Absolutely a scam.

Scam. Nothing changed at all.

No change in mileage.

Terrible. My milage went from 18 mpg to 12.8 mpg. I removed it after a few days and my mpg went back up. About 4 hours later my radio in my 2010 Dodge Grand Caravan quit working. Sorry I ever tried it. I bought the Van new in 2009 and had no problems just wanted to increase my mpg now I've got to spend 5 to 8 hundred dollars to replace radio with an aftermarket that won't do all that my original one would do. Very disappointed. Battery drains overnight now since I removed the device. Now having to take to dealer at $150 per hr for diagnosis.

Update: The Pictures:I went on a bachelor party weekend to South Lake Tahoe, it was fun, on the way back I took a picture before and after of the odometer. It said I drove 110 miles, I think, I drove home and dropped people off, I used less than a quarter tank of gas, the speed is easy to see, under that is how many miles before I need gas, it said I went 9 miles.I had three guys in my car, they all wanted he EcoFuel boost when I was done. One guy didn't drive up with me, he said the other car had to stop for gas twice.I didn't see how this would work. But, I'm good to check. So I drove for hours, not like normal, and my gas didn't go away. I normally have to fill up every Thursday.After driving a ton more to check and see if it works, it's Friday, still have 3/4th of a tank. I drove without it for about twenty minutes, my odometer said I drove 17 miles. I drove the eagles distance with this, my odometer said I drove 15 miles.I don't understand, I feel seriously stupid. But my gas is lasting longer. I watched a few YouTube videos, they said the same thing about mileage, not much difference, but better.I drove a lot more to check and see if this works. After driving a ton more, my gas tank is still way more full than it usually is. It doesn't make sense.I also noticed a change in the feel of the drive. It made my car feel like it had more energy. Hard to explain. But I'm really happy I didn't listen to the guy saying it's a scam.